Keysight Technologies N9321C User Manual page 62

Functions and Measurements
Making Distortion Measurements
54
The signal produces harmonic products (spaced 200 MHz from the
original 200 MHz signal) in the analyzer input mixer as shown in
Figure 3-16
.
4 Change the center frequency to the value of the first harmonic:
Press Peak Search > Next Peak
Press Marker > Marker To > To Center
5 Change the span to 50 MHz and re-center the signal:
Press Span > 50 > MHz
Press Peak Search
Press Marker > Marker To > To Center
6 Set the attenuation to 0 dB:
Press Amplitude > Attenuation > 0 > dB
7 To determine whether the analyzer generates harmonic distortion
products, first display the trace data in trace 2 as follows:
Press Trace/Det > Select Trace > Trace 2
Press Clear Write
8 Allow trace 2 to update (minimum two sweeps), then store the data
from trace 2 and place a delta marker on the harmonic of trace 2:
Press Trace/Det > View
Press Peak Search
Press Marker > Mode > Delta
The analyzer display shows the stored data in trace 2 and the
measured data in trace 1. The Markerindicator reads the
difference in amplitude between the reference and active markers.
9 Increase the RF attenuation to 10 dB:
Press Amplitude > Attenuation > 10 > dB